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Solution: Assume that the sample is taken from a large
Chapter 6, Problem 16E(choose chapter or problem)
Problem 16E
Assume that the sample is taken from a large population and the eorrection factor can be ignored.
Cell Phone LifetimesA recent study of the lifetimes of cell phones found the average is 24.3 months. The standard deviation is 2.6 months. If a company provides its 33 employees with a cell phone, find the probability that the mean lifetime of these phones will be less than 23.8 months. Assume cell phone life is a normally distributed variable.
Questions & Answers
QUESTION:
Problem 16E
Assume that the sample is taken from a large population and the eorrection factor can be ignored.
Cell Phone LifetimesA recent study of the lifetimes of cell phones found the average is 24.3 months. The standard deviation is 2.6 months. If a company provides its 33 employees with a cell phone, find the probability that the mean lifetime of these phones will be less than 23.8 months. Assume cell phone life is a normally distributed variable.
ANSWER:
Solution 16E
Step1 of 2:
From the given problem we have:
We need to find the probability that the mean lifetime of these phones will be less than 23.8 months.
Step2 of 2:
Let us consider a random variable